Keyboard



FIG. 1 is a top plan view of a keyboard showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is right side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a top, front, right side perspective view thereof, on an enlarged scale.

The left side elevational view of the keyboard is identical to the right side elevational view thereof. 

The ornamental design for keyboard, as shown and described. 